Tangy pickled cabbage and spicy carrot kimchi are the key to Angelo Sosa's tofu-topped green salad at New York City's Xie Xie (shay-shay; "thank you" in Mandarin). They are supereasy to make, but for a great shortcut, use store-bought kimchi (a chile-flecked Korean pickle that's often made with cabbage) in place of both.